CD214L-T26ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T26ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 26V reverse standoff voltage with a 42.1V maximum clamping voltage and 71.2A peak pulse current. Housed in the DO-214AB (SMC) surface mount package, this component is designed for general-purpose transient voltage protection applications across an operating temperature range of -55°C to 150°C.

The CD214L-T26ALF is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute parts must maintain electrical equivalence across voltage ratings, clamping characteristics, and current handling capabilities while accommodating variations in power dissipation and temperature performance.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	26V
Voltage - Breakdown (Min)	28.9V
Voltage - Clamping (Max) @ Ipp	42.1V
Current - Peak Pulse (10/1000µs)	71.2A
Power - Peak Pulse	3000W (3kW)
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD214L-T26ALF are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following mandatory parameters:

Voltage - Reverse Standoff (Typ): 26V
Voltage - Breakdown (Min): 28.9V
Voltage - Clamping (Max) @ Ipp: 42.1V
Unidirectional Channels: 1
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener

Substitutes are further categorized by current handling and power dissipation characteristics. Direct equivalents maintain the 71.2A peak pulse current and 3000W power rating. Enhanced-performance substitutes provide higher current ratings (119A) and increased power dissipation (5000W), suitable for applications requiring additional margin. Lower-performance substitutes with reduced current ratings (35.7A) and power dissipation (1500W) are applicable only where circuit requirements permit reduced transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status	RoHS Status
CD214L-T26ALF	Bourns Inc.	26V	42.1V	71.2A	3000W	-55°C ~ 150°C	Obsolete	ROHS3 Compliant
SMLJ26A	Bourns Inc.	26V	42.1V	71.2A	3000W	-55°C ~ 150°C	Active	ROHS3 Compliant
5.0SMDJ26A	Taiwan Semiconductor Corporation	26V	42.1V	119A	5000W	-55°C ~ 175°C	Active	ROHS3 Compliant
5.0SMDJ26A-T7	Littelfuse Inc.	26V	42.1V	119A	5000W	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ26A	MDD	26V	42.1V	35.7A	1500W	-50°C ~ 150°C	Active	ROHS3 Compliant
SMCJ26A-TP	Micro Commercial Co	26V	42.1V	35.7A	1500W	-55°C ~ 175°C	Active	ROHS3 Compliant
SMCJ26A-TR	STMicroelectronics	26V	54.6V	187A (8/20µs)	1500W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMDJ26A	Alpha & Omega Semiconductor Inc.	26V	42.1V	71.3A	3000W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMDJ26A-HR	Littelfuse Inc.	26V	42.1V	71.3A	3000W	-65°C ~ 150°C	Active	ROHS3 Compliant
SMDJ26A-HRA	Littelfuse Inc.	26V	42.1V	71.3A	3000W	-65°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes)

SMLJ26A (Bourns Inc.), SMDJ26A (Alpha & Omega Semiconductor Inc.), SMDJ26A-HR (Littelfuse Inc.), and SMDJ26A-HRA (Littelfuse Inc.) provide direct electrical equivalence to the CD214L-T26ALF. These parts maintain identical voltage ratings (26V standoff, 42.1V clamping), current handling (71.2–71.3A peak pulse), and power dissipation (3000W). All are active products with ROHS3 compliance and MSL 1 rating. Operating temperature ranges are -55°C to 150°C, matching the original specification. These substitutes are suitable for direct replacement in existing designs without circuit modification.

Enhanced-Performance Substitutes

5.0SMDJ26A (Taiwan Semiconductor Corporation) and 5.0SMDJ26A-T7 (Littelfuse Inc.) offer increased current capacity (119A) and power dissipation (5000W) while maintaining the 26V standoff and 42.1V clamping voltages. These parts provide additional transient energy absorption margin and are applicable where circuit design permits higher performance specifications. Both are active products with ROHS3 compliance. The 5.0SMDJ26A-T7 extends the lower operating temperature limit to -65°C.

Lower-Performance Substitutes

SMCJ26A (MDD) and SMCJ26A-TP (Micro Commercial Co) maintain voltage equivalence but provide reduced current capacity (35.7A) and power dissipation (1500W). These parts are suitable only for applications where transient energy requirements are lower than the original design specification. SMCJ26A-TP extends the upper operating temperature to 175°C.

Non-Equivalent Substitute

SMCJ26A-TR (STMicroelectronics) exhibits a higher clamping voltage (54.6V) and significantly higher current rating (187A at 8/20µs pulse), making it unsuitable as a direct substitute. This part is not recommended for CD214L-T26ALF replacement.

All recommended substitutes are ROHS3 compliant and carry ECCN EAR99 classification, maintaining regulatory consistency with the original part.

Frequently Asked Questions (FAQ)

Q: Can SMLJ26A directly replace CD214L-T26ALF in production?

A: Yes. SMLJ26A is manufactured by Bourns Inc. and provides identical electrical specifications: 26V standoff voltage, 42.1V clamping voltage, 71.2A peak pulse current, and 3000W power dissipation. Operating temperature range (-55°C to 150°C) and package type (DO-214AB, SMC) are identical. ROHS3 compliance and MSL 1 rating match the original part. Direct substitution is supported without circuit modification.

Q: What is the difference between SMDJ26A and SMDJ26A-HR?

A: Both parts are manufactured by Littelfuse Inc. and provide identical electrical performance: 26V standoff, 42.1V clamping, 71.3A peak pulse current, and 3000W power dissipation. The primary difference is operating temperature range. SMDJ26A-HR extends the lower temperature limit to -65°C, compared to -55°C for standard variants. Selection depends on application temperature requirements.

Q: Why is SMCJ26A-TR not recommended as a substitute?

A: SMCJ26A-TR exhibits a clamping voltage of 54.6V, which exceeds the 42.1V specification of the CD214L-T26ALF. This higher clamping voltage may result in inadequate transient suppression in circuits designed for the lower 42.1V threshold. Additionally, the current rating (187A at 8/20µs) and power dissipation (1500W) differ from the original specification. This part is not electrically equivalent.

Q: Can lower-performance substitutes like SMCJ26A be used?

A: SMCJ26A and SMCJ26A-TP maintain voltage equivalence (26V standoff, 42.1V clamping) but provide reduced current capacity (35.7A) and power dissipation (1500W). These parts are suitable only if circuit analysis confirms that transient energy requirements do not exceed 1500W and peak pulse current does not exceed 35.7A. Use of lower-performance substitutes in applications requiring higher energy absorption may result in component failure or inadequate protection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this document carry ROHS3 compliance certification, maintaining regulatory consistency with the CD214L-T26ALF.

Q: What packaging options are available for substitutes?

A: All substitute parts use the DO-214AB (SMC) surface mount package, matching the original CD214L-T26ALF. Packaging format variations (Tape & Reel, Cut Tape, bulk) are available from different manufacturers and suppliers but do not affect electrical performance or PCB compatibility.

Q: Can enhanced-performance substitutes like 5.0SMDJ26A be used in place of the original part?

A: Yes. Enhanced-performance substitutes maintain the required voltage specifications (26V standoff, 42.1V clamping) and provide higher current capacity (119A) and power dissipation (5000W). These parts are backward-compatible with designs specified for the CD214L-T26ALF and offer additional transient energy absorption margin. No circuit modification is required.

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